Perf improvements for ConfidenceWeighting
Perf improvements for ConfidenceWeighting

Craigacp/factorie,factorie/factorie,joprice/factorie,digitalreasoning/factorie-scala-210,zxsted/factorie,asubbaswamy/factorie,malcolmgreaves/factorie,pogren-oracle/factorie,melisabok/factorie,hlin117/factorie,strubell/factorie,patverga/factorie